金刚钻

Traditional (Taiwan): 金剛鑽

jīngāngzuàn ㄐㄧㄣ ㄍㄤ ㄗㄨㄢˋ

    • a diamond

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
diamond
Meaning
Diamond, the hardest natural material. Figuratively a person of knowledge and talent, or superb skill.

Sources